<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>upload file</h1>
    <form method="post" enctype="multipart/form-data" >
        {{ form.as_p }}
        <select name="nav" id="">
            {% for n in nav %}
                <option value="{{ n.nav }}">{{ n.nav }}</option>
            {% endfor %}

        </select>
        <br>
        <input type="submit" value="Submit" />
    </form>
</body>
</html>